Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chieu sang, chieu xanh
chua nang » chuc nang, chua xang, kha nang
cua nang » cua dang, cua hang, cua nong
cong tac » cong ty
tac nhan » tao nhan, cac nhan, dac nhan
nhan ha » nhanh ha, nhan hoa, nhan va

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - thanh trung ((cua nang) OR (chua nang)) cong tac nhan ha~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chiet tach)) - thanh trung ((cua nang) or (chua nang)) cong tac nhan ha~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chiet tach)) - thanh trung ((cua nang) or (chua nang)) cong tac nhan ha*.